:root {
  --background-color: #fff;
  --heading-color: #222;
  --link-color: #3273dc;
  --visited-color: #8b6fcb;
  --text-color: #444;
  --heading-color: #222

  --font-yahei: Verdana, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Ubuntu, "Helvetica Neue", Helvetica, Arial, "PingFangSC-Regular", "Hiragino Sans GB", "Lantinghei SC", "Microsoft Yahei", "Source Han Sans CN", "WenQuanYi Micro Hei", SimSun, sans-serif;
  --font-fangsong: Baskerville, "Times New Roman", "Liberation Serif", STFangsong, FangSong, FangSong_GB2312, "CWTEX\-F", serif;
  --font-songti: Georgia, "Nimbus Roman No9 L", "Songti SC", "Noto Serif CJK SC", "Source Han Serif SC", "Source Han Serif CN", STSong, "AR PL New Sung", "AR PL SungtiL GB", NSimSun, SimSun, "TW\-Sung", "WenQuanYi Bitmap Song", "AR PL UMing CN", "AR PL UMing HK", "AR PL UMing TW", "AR PL UMing TW MBE", PMingLiU, MingLiU, serif;
}

body {
  /* font-family: var(--font-yahei); */
}

a {
  font-size: 16px;
  color: var(--link-color);
  text-decoration: none;
  &:hover {
    text-decoration: underline;
  }
  
}

a.is-active {
  text-decoration: underline;
}